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0.1.. GRUBBS 4 PHONOGRAPH REPRODUCER.

APPLICATION FILED 1,111.15. 1919.

Patented Sept. 2, 1919.

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Specicat'ivon ofLctters Patent;

Application led January .15, 1919. Serial No. 271,258.

V reproduction of sound.

A further object is to provide a reproducer utilizin a non -resllient member` in lieu of the or mary iexible or resilient diaphragm andv which member is movably supported by the stylus lever of the reproducer and which lever is resiliently mounted in a novel manner. j

A further object is to provide simple and eilcient means for preventing the escape oi air past the yieldingly supported member.

.With the foregoing and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that Within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without den parting from the spirit of the invention.

In the accompanying drawings the preferred form the invention has been shown.l

In said drawings:

Figure 1 is a central vertical section through a sound box having the present improvements.

/ Fig. 2 is a face, view of the souiid box, all but a portion of the cap being removed;

Fig. 3 is a section on an enlarged scale taken on line ifi- 3, Fig. 2.

Referring to the figures by characters of lreference 1 designates the body portion 'of the sound boX, provided with an interior shoulder 2 and which is also internally screw threaded as shown at 3. A cap 4 having 'a screw threaded peripheral portion 5 isl adapted to engage the threaded portion 3 of the bodyl and to clamp on the marginal portion of a ring 6 formed of soft leather, balloon silk or other'suitable flexible ma- .,terial secured to the margin of a disk 7 of .wood or other non-resilient material. The ring 6 extends very loosely from the disk 7 to the shoulder 2 on which it is clamped,

i bridges over the arm'8.

'thus to' allow the disk 7`to move back and ratentea sept. a,- ieie.

sitely disposed communicating frusto-,conr

cal openings. A socket member l1 having a clamping screw 12 extends downwardly from the rocker 9 and in line with Ithearm 8 and is adapted to receive a needle N such as commonly used. The cap 4 is cut away to allow' the rocker 9 to be attached tothe peripheral portion thereof and likewise to4 allow the arm 8 to' extend between the cap 4 and the body 1. As shown in Figs. l and 3 v of the cap 4 has an oset Screws 14 extend through the. opening 10 in the rocker 9`and mounted on each screw are oppositely disposed frusto conical plugs 15, formed of rubber and which are preferably hollow u as shown at 16.

These plu s come together at their inner or' s and. are clamped tightly tosmall en gether and against the walls of the openings 10 by the screws 14, the large end of one plug of each pair bearing against the `-cap 4 while the large end of the opposed plug bears against 'the head. of the screw .14. Thus it will be seen that the stylus arm or lever 8 is supported yieldingly and also serves to support the disk 7 yieldingly. Any vibration produced by the movement of the needle 12 will be transmitted bodily to the disk 7 because of the yielding supporting plugs 15 on which the rocker 9 is mounted. `The back and forth movement of the disk 7 due to the vibration of theneedle will re"- sult in the air in the space being vibrated so as to reproduce the sound recorded. The flexible ring 6 merely serves as a seal between'the disk 7 and the wall of the body 2 so as to prevent leakage of air from theportion 13 which isl utilized. This reprodueer eliminates` the bending and crackling of the diaphragm and which has heretofore drowned outthe pure overtures so desirable to reproduce. 5 What is claimed is:

l. A reproducer for phonographs ineluding a sound box, a rocher arm having opposed openings therein, tapered plugs of elastic material lseated in the openings, 1o screws extending through the plugs for attaching them and the rocker arm `vi'eldingly to the sound box, a stylus lever extending from the rocker arm and into the sound box, and a movable disk ixedly mounted on said 15 lever. y

2. reprodueer for phonographs including a sound box, a rocker arm having openings extending through' the ends thereof, each opening being flared outwardly at its ends, tapered plugs of elastie material seated within the iared ends of the openings, eaoh plug being hollow, attaching screws extending through plugs and into the sound box for fastening the plugs and rocker arm to the sound box, a stylus lever extending from the rocker arm and in to the sound box and a movable disk iixedly mounted on the arm. -In testimony that I claim the foregoing as my own, I have hereto aflixed my signatuie in the presence of two witnesses.

OREN L. GRUBBS.

VJitnesses A. D. S'rANcLirr, JAMES l. FREW. 

